今天使用Mac Vscode Android模拟器运行项目编译时提示警告：

Warning: Mapping new ns http://schemas.android.com/repository/android/common/02 to old ns http://schemas.android.com/repository/android/common/01
Warning: Mapping new ns http://schemas.android.com/repository/android/generic/02 to old ns http://schemas.android.com/repository/android/generic/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/02 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/addon2/03 to old ns http://schemas.android.com/sdk/android/repo/addon2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/02 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/repository2/03 to old ns http://schemas.android.com/sdk/android/repo/repository2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/03 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01
Warning: Mapping new ns http://schemas.android.com/sdk/android/repo/sys-img2/02 to old ns http://schemas.android.com/sdk/android/repo/sys-img2/01
Warning: 意外的元素 (uri:"", local:"base-extension")。所需元素为<{}codename>,<{}layoutlib>,<{}api-level>

上述错误是，将新 ns 映射到旧 ns，解决方案是升级gradle。

首先，修改android/gradle/wrapper/gradle-wrapper.properties：

distributionUrl=https\://services.gradle.org/distributions/gradle-7.4-all.zip

再修改项目android/build.gradle和SDK：flutter/packages/flutter_tools/gradle/flutter.gradle：

dependencies {
    classpath 'com.android.tools.build:gradle:7.1.2'
}